Stewie is ageless, but his specific age remains a mystery. It's unclear how old Stewie became on this planet. The toddler persona from the animated television show "Family Guy" is forever young. His time on Earth is yet determined.
Stewart Gilligan Griffin, the clever little troublemaker, is hiding his true age from the world. Speculation runs rampant as to his actual age. Is he over a hundred years old? Or is he fresh to the world?
The answer is known only to Stewie! This enigmatic character continues to mesmerize fans with his undisclosed age and youthful appearance.
Saison 11 des Griffin Wikipédia